That part is helpful if the app is in the App Catalog. Unfortunately, not all apps are in there. Take Safari for example. Having a dedicated place for pulling reports on apps would be fantastic.

You can sort of get this info about app installs already....
I wouldn't say it's the best tool/reporting method, and in my instance only the App Store apps handled via VPP have any installs info present, but if you go to the Catalog section of Apps & Media and click on the app bundle, and then the Installs tab, you can get this info.

I think there's a lot of room for improvement in reporting app installed/version installed etc, for example, on each device group page it would be absolutely amazing to have an apps assigned dashboard that had the app install state overview for apps assigned to that device group...

It'd be great to have a reporting tool in the GUI. This way I can easily look up a specific app and see what version is installed on multiple/all devices. I know there is an API tool but having something in the GUI would be great.